When I was in college there was black “albino” on campus, She had frizzy hair, but I was always nice to her, she really wanted to learn the western classics, and not be judged on her condition, but her knowledge.
These girls were not albinos, though I’ve seen Black ones.
Most Blacks in the US are not purely African Black. They’re mixed up, over hundreds of years, with all sorts of European and indigenous New World blood. A Black person may look ‘Black’ to you, but had a white parent. If they then marry a blonde White person, there are all sorts of ways the genes can fall.
It’s not common for them to come out like my little friends, but it happens.